Improvement in adjustable scaffolds



i. BELLN. Adjustable Scaffolds,

Patented Nov. 4, 1873.'

Wimasses 'UNITED S'alA'IJEs i A'rnlv'r Fries.

JOHN Dumon', or New vomi, N531 IMPROVEMENT IN ADJUSTABLE scAFFoLos.

Specification forming part ofLetters Patent No. 144,263, dated November 4, 1873; application iiled September 13, 1873.

To all whom 'it may concern:

Be it known that I, JOHN DILLON, of New York city, in the county and State of New York, have invented a new and Improved EX- tension Truss, of which the following' is a speciication:

In the accompanying drawing, Figure 1 represents a side elevation, partly in section, of my improved extension-truss; Fig. 2, a rear view of the same. Figs. 3 and 4, respectively, show the application of one-half of the truss, as ladder and as platform, suspended from a house; and Fig. 5 is a detail transverse section through the rear part of the truss, showing the attachment of the extension pieces to the guides by the connecting crossrods.

Similar letters of reference indicate corre sponding parts.

The object of my invention is to furnish, for use in the trade, an adjustable extensiontruss, which may be applied with equal facility for various purposes, as truss for sca-Holding, common ladder, platform, and step-ladder, its simplicity of construction allowing it to be built at comparatively low rates, while its compact-ness in folding makes it easily 1novable from place to place.

The invention will first be fully described, and then clearly pointed out in the claims.

In the drawing, A B represent the two parts v of the extension-truss, which are hinged together near the top by means of side plates a and cross -rod and nut b b', so as to fold up and be easily detachable, as necessary in the application of the parts. The tops of the halves A B are united by laterally-connecting boards d and a hinged board, cl', which lits over the recess e formed at the adjoining top ends of the parts A B. The recess c is lined with metal plates, and serves to hold a vertical cross-board, passed through the same, which projects at both sides of the truss, and support-s the boards connecting with the next truss. Strong bolts f are inserted through the top boards d, and pass down through boards cl2 below them, for retaining the longitudinal pieces, on which the frame-work or platform connecting the trusses is laid. The distance of one bolt, f, from the sides of parts A B allows one supporting piece to be passed through, while the other may be adjusted so as to give space for two to make the joint, as indicated in Fig. 2. The front and rear parts A B are inclined toward each other, so as to brace the top. Both parts may be extended to and adj usted at different heights-the front part A by sliding pieces A', which are guided' by suitable plates g, of which one set is attached to pieces A', embracing pieces A, the other to pieces A, clasping over slides A. Holes 71, in piecesAA, and clasp-plates g, and screw-bolts i attached to chains 2', serve to lock the sliding pieces in any required position on the main pieces A. The top side plates a limit the upward motion of slidingpieces A, the lower ends of which project beyond the pieces A, and are provided with metallic sockets l, produced with the angles of inclination of the truss to the fioor or groiuid'. Both pieces A A are connected by rounds in such a manner that they offer in any position a double support to the foot. The rear part B is extended by means of slides B which move in guide-recesses m of part B. Lateral pieces n stiften part B, while steps or rods n stiften the slides B. rlhe connection of slides B and part B is made by holes o in the former, holes o1 and washer-plates o2 at the outer sides of part B, and a cross-rod, p, with screw end and head, by which the parts are rmly retained in any position corresponding to that of partv A. Slides B project also in a similar manner to slides A and have shoes or sockets l.

Vhen the truss is folded up, the boards connecting the trusses may bc secured between the steps of the front part A, serving thereby as support for paint-pots and other implements. In similar manner, either half may be used as a suspended platform for painters, for painting the outside of houses, while the detached front part may bc applied as an extension-ladder.

In its common form it is also useful as a step-ladder. In fact, the truss may iind various applications in the trades, which are not necessary to be enumerated.

Hz ving thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The truss A. B, formed of two part-s hinged vtogether7 and having an intermediate recess, 3. The recessed rear part'B, connected with e, combined with supporting pieces braced by sliding pieces B by screw cross -rod p, and

hinged top board d1, as and for the purpose Washer-plates o27 substantially asset forth.

described. JNO. DILLON.

2. The connecting top boards d d2 of parts A B, having vertically-adjustable bolts f for VtlleSses:

guiding longitudinally-oonneoting; supports, as PAUL GOEPEL,

described. T. B. Mosman. 

